| Nowadays, energy and environmental issues have become a key factor restrictingsocial development, but distributed power generation technology can make a win-winsituation for the energy conservation and environmental protection, so this kind oftechnology has become one of the important development directions in the electricalpower industry. However there are also lots of problems with distributed power. Inorder to solve the contradiction between the power systems and distributed power, theconception of micro grid was proposed. So the research work to improve the electricpower and it has important theory meaning and project value.This thesis introduces the microgrid background according to the oil productionplatform and summaries the elements in the microgrid system. In the following, theissue of electricity quality is explained, in particular with emphasis on the influence ofwind power and solar photovoltaic power to the grid. And at this time the otherelements harmonic is proposed.So it analyzes the harmonic wave in the microgrid and it mainly discusses theharmonic wave which generated by rotor side converter. It also designs the applicationof permanent magnet direct driven converter to transmit the power into the alternatingcurrent grid. Besides, it analyzes the harmonic wave generated by the photovoltaicpower inverter. Meanwhile, it summaries the development of inverter and illustratesthe load in the system and the issue of harmonic wave as well as reactive powercompensation. Next, this thesis elaborates the working principles of APF, its testingprocedures and current research status. It proposes that APF can be applied in themicrogrid system. It examines the proposal by comparing the current and voltagebefore and after the load of APF. It points out that APF can be applied to microgrid tocurb the harmonic wave.Lastly, this thesis introduces the basic principles of SVG,reactive current test, its controlling methods etc. It proposes that SVG can providereactive compensation for the microgrid. In addition, it points out the proposal isscientific and practical through the comparison of the wave simulation. |
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